Optical lens assembly and image capturing device

ABSTRACT

An optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element and a third lens element. The first lens element with positive refractive power has an object-side surface being convex, and the object-side surface and an image-side surface thereof are aspheric. The second lens element with negative refractive power has an image-side surface being concave, and an object-side surface and the image-side surface thereof are aspheric. The third lens element with refractive power has an object-side surface being concave, and the object-side surface and an image-side surface thereof are aspheric. The optical lens assembly further includes a stop with no lens element having refractive power disposed between the stop and the first lens element. The optical lens assembly has a total of three lens elements with refractive power.

RELATED APPLICATIONS

This application is a continuation application of U.S. application Ser.No. 16/456,638 filed on Jun. 28, 2019, which is a continuationapplication of U.S. application Ser. No. 16/015,491 filed on Jun. 22,2018, which is a continuation application of U.S. application Ser. No.14/680,983 filed on Apr. 7, 2015, which claims priority to TaiwanApplication No. 104103810 filed Feb. 4, 2015. The entire disclosure ofwhich is incorporated by reference herein.

BACKGROUND Technical Field

The present disclosure relates to an optical lens assembly and an imagecapturing device. More particularly, the present disclosure relates to acompact optical lens assembly and image capturing device applicable toelectronic devices.

Description of Related Art

In recent years, with the popularity of mobile terminals having camerafunctionalities, the demand of miniaturized optical systems has beenincreasing. The sensor of a conventional optical system is typically aCCD (Charge-Coupled Device) or a CMOS (ComplementaryMetal-Oxide-Semiconductor) sensor. As the advanced semiconductormanufacturing technologies have reduced the pixel size of image sensorsand compact optical systems have gradually evolved toward the field ofhigher megapixels, there is an increasing demand for compact opticalsystems featuring better image quality.

Conventional optical system for telephoto adapts multi-piece lensstructure and the lens elements thereof are made of glass material andsurfaces of each lens element are spherical. However, the optical systemis expansive, bulk, difficult to carry, and cannot satisfy therequirements of convenient and multi-function specifications.

SUMMARY

According to one aspect of the present disclosure, an optical lensassembly includes, in order from an object side to an image side, afirst lens element, a second lens element, and a third lens element. Thefirst lens element with positive refractive power has an object-sidesurface being convex, wherein the object-side surface and an image-sidesurface of the first lens element are aspheric. The second lens elementwith negative refractive power has an image-side surface being concave,wherein an object-side surface and the image-side surface of the secondlens element are aspheric. The third lens element with refractive powerhas an object-side surface being concave, wherein the object-sidesurface and an image-side surface of the third lens element areaspheric. The optical lens assembly further includes a stop, wherein nolens element with refractive power is disposed between the stop and thefirst lens element. The optical lens assembly has a total of three lenselements with refractive power.

When a focal length of the optical lens assembly is f, a curvatureradius of the image-side surface of the second lens element is R4, acurvature radius of the object-side surface of the third lens element isR5, an axial distance between the stop and the image-side surface of thethird lens element is SD, and an axial distance between the object-sidesurface of the first lens element and the image-side surface of thethird lens element is TD, the following conditions are satisfied:

-   -   1.25<f/R4;    -   −1.0<R5/f<0; and    -   0.6<SD/TD<1.0.

According to another aspect of the present disclosure, an imagingcapturing device including the optical lens assembly according to theaforementioned aspect and an image sensor, wherein the image sensor islocated at the image side of the optical lens assembly.

According to further another aspect of the present disclosure, an imagecapturing device including the optical lens assembly according to theaforementioned aspect, a prism, and an image sensor, the optical lensassembly is located between the prism and the image sensor.

According to yet another aspect of the present disclosure, an opticallens assembly includes, in order from an object side to an image side, afirst lens element, a second lens element, and a third lens element. Thefirst lens element with positive refractive power has an object-sidesurface being convex, wherein the object-side surface and an image-sidesurface of the first lens element are aspheric. The second lens elementwith negative refractive power has an image-side surface being concave,wherein an object-side surface and the image-side surface of the secondlens element are aspheric. The third lens element with negativerefractive power has an object-side surface being concave, wherein theobject-side surface and an image-side surface of the third lens elementare aspheric. The optical lens assembly has a total of three lenselements with refractive power, and the first through third lenselements are three independent and non-cemented lens elements. When afocal length of the optical lens assembly is f, a curvature radius ofthe image-side surface of the second lens element is R4, and a curvatureradius of the object-side surface of the third lens element is R5, thefollowing conditions are satisfied:

-   -   1.25<f/R4; and    -   −2.6<R5/f<0.

According to still another aspect of the present disclosure, and opticallens assembly includes, in order from an object side to an image side, afirst lens element, a second lens element, and a third lens element. Thefirst lens element with positive refractive power has an object-sidesurface being convex, and the object-side surface and an image-sidesurface of the first lens element are aspheric. The second lens elementwith negative refractive power has an image-side surface being concave,and an object-side surface and the image-side surface of the second lenselement are aspheric. The third lens element with refractive power hasan object-side surface being concave, and the object-side surface and animage-side surface of the third lens element are aspheric. The opticallens assembly has a total of three lens elements with refractive power.When a focal length of the optical lens assembly is f, a curvatureradius of the image-side surface of the second lens element is R4, acurvature radius of the object-side surface of the third lens element isR5, an Abbe number of the first lens element is V1, an Abbe number ofthe second lens element is V2, and an Abbe number of the third lenselement is V3, the following conditions are satisfied:

-   -   0.50<f/R4;    -   −2.6<R5/f<0; and    -   (V2+V3)/V1<1.0.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be more fully understood by reading thefollowing detailed description of the embodiment, with reference made tothe accompanying drawings as follows:

FIG. 1 is a schematic view of an image capturing device according to the1st embodiment of the present disclosure;

FIG. 2 shows spherical aberration curves, astigmatic field curves, and adistortion curve of the image capturing device according to the 1stembodiment;

FIG. 3 is a schematic view of an image capturing device according to the2nd embodiment of the present disclosure;

FIG. 4 shows spherical aberration curves, astigmatic field curves, and adistortion curve of the image capturing device according to the 2ndembodiment;

FIG. 5 is a schematic view of an image capturing device according to the3rd embodiment of the present disclosure;

FIG. 6 shows spherical aberration curves, astigmatic field curves, and adistortion curve of the image capturing device according to the 3rdembodiment;

FIG. 7 is a schematic view of an image capturing device according to the4th embodiment of the present disclosure;

FIG. 8 shows spherical aberration curves, astigmatic field curves, and adistortion curve of the image capturing device according to the 4thembodiment;

FIG. 9 is a schematic view of an image capturing device according to the5th embodiment of the present disclosure;

FIG. 10 shows spherical aberration curves, astigmatic field curves, anda distortion curve of the image capturing device according to the 5thembodiment;

FIG. 11 is a schematic view of an image capturing device according tothe 6th embodiment of the present disclosure;

FIG. 12 shows spherical aberration curves, astigmatic field curves, anda distortion curve of the image capturing device according to the 6thembodiment;

FIG. 13 is a schematic view of an image capturing device according tothe 7th embodiment of the present disclosure;

FIG. 14 shows spherical aberration curves, astigmatic field curves, anda distortion curve of the image capturing device according to the 7thembodiment;

FIG. 15 is a schematic view of an image capturing device according tothe 8th embodiment of the present disclosure;

FIG. 16 shows spherical aberration curves, astigmatic field curves, anda distortion curve of the image capturing device according to the 8thembodiment;

FIG. 17 is a schematic view of an image capturing device according tothe 9th embodiment of the present disclosure;

FIG. 18 shows spherical aberration curves, astigmatic field curves, anda distortion curve of the image capturing device according to the 9thembodiment;

FIG. 19 is a schematic view of an image capturing device according tothe 10th embodiment of the present disclosure;

FIG. 20 shows spherical aberration curves, astigmatic field curves, anda distortion curve of the image capturing device according to the 10thembodiment;

FIG. 21 is a schematic view of an image capturing device according tothe 11th embodiment of the present disclosure;

FIG. 22 shows spherical aberration curves, astigmatic field curves, anda distortion curve of the image capturing device according to the 11thembodiment;

FIG. 23 is a schematic view of an image capturing device according tothe 12th embodiment of the present disclosure;

FIG. 24 shows spherical aberration curves, astigmatic field curves, anda distortion curve of the image capturing device according to the 12thembodiment;

FIG. 25 is a schematic view of an image capturing device according tothe 13th embodiment of the present disclosure; and

FIG. 26 is a schematic view of an image capturing device according tothe 14th embodiment of the present disclosure.

DETAILED DESCRIPTION

An optical lens assembly includes, in order from an object side to animage side, a first lens element, a second lens element, and a thirdlens element. The optical lens assembly has a total of three lenselements with refractive power.

The first lens element with positive refractive power has an object-sidesurface being convex, and the object-side surface and an image-sidesurface are aspheric. The object-side surface of the first lens elementcan have the largest curvature of all surfaces of lens elements in theoptical lens assembly, so that the refractive power centers on theobject side of the optical lens assembly. The first lens element withdesignable positive refractive power makes the optical lens assemblymore compact and portable.

The second lens element with negative refractive power has an image-sidesurface being concave, and an object-side surface and the image-sidesurface are aspheric. The image-side surface of the first lens elementand the object-side surface of the second lens element can have thesmallest curvature of all surfaces of lens elements in the optical lensassembly. Therefore, the aberration generated by the first lens elementcan be corrected and the designable convergence across differentwavelength range is provided. Moreover, a curvature of the image-sidesurface of the second lens element can be increasingly concave from aparaxial region to an off-axis region thereof. Therefore, thelight-receiving magnitude is improved and image is more clarity sincethe marginal ray is effective controlled.

The third lens element with refractive power has an object-side surfacebeing concave, and the object-side surface and the image-side surfaceare aspheric. An image-side surface of the third lens element can beconvex. Therefore, the aberration of the optical lens assembly can becorrected. Moreover, a curvature of the object-side surface of the thirdlens element can be increasingly concave from a paraxial region to anoff-axis region thereof. Therefore, light-receiving efficient from theoff-axis field can be enhanced to increase relative illumination ofperipheral image.

The object-side surfaces and the image-side surfaces of the first lenselement, the second lens element, and the third lens element arearranged to be aspheric, since the aspheric surface of the lens elementis easy to form a shape other than spherical surface of the lens elementso as to have more controllable variable for eliminating the aberrationthereof, and to further decrease the required number of the lenselements. Therefore, the total track length of the optical lens assemblycan also be reduced.

When a focal length of the optical lens assembly is f, and a curvatureradius of the image-side surface of the second lens element is R4, thefollowing condition is satisfied: 0.50<f/R4. Therefore, the sphericalaberration and astigmatism generated by the first lens element with highrefractive power can be balanced. Preferably, the following condition issatisfied: 1.25<f/R4. More preferably, the following condition issatisfied: 1.65<f/R4<6.0.

When the focal length of the optical lens assembly is f, and a curvatureradius of the object-side surface of the third lens element is R5, thefollowing condition is satisfied: −2.6<R5/f<0. Therefore, the straylight can be eliminated since the incident angle of light is alleviated,and refractive power of the third lens element can be controlled to makethe optical lens assembly having an applicable back focal length.Preferably, the following condition is satisfied: −1.0<R5/f<0.

The optical lens assembly further includes an aperture stop with no lenselement having refractive power disposed between the aperture stop andthe first lens element. The aperture stop is for eliminating the straylight and thereby improving the image resolution. When an axial distancebetween the aperture stop and the image-side surface of the third lenselement is SD, and an axial distance between the object-side surface ofthe first lens element and the image-side surface of the third lenselement is TD, the following condition is satisfied: 0.6<SD/TD<1.0.Therefore, the telecentric effect of the optical lens assembly can beeffectively enhanced.

When an Abbe number of the first lens element is V1, an Abbe number ofthe second lens element is V2, and an Abbe number of the third lenselement is V3, the following condition is satisfied: (V2+V3)/V1<1.0.Therefore, the chromatic aberration of the optical lens assembly can becorrected.

According to the optical lens assembly of the present disclosure, thefirst to third lens elements are three independent and non-cemented lenselements. In other words, there is an air gap between any two of thefirst lens element, the second lens element, and the third lens elementthat are adjacent to each other. The manufacturing process of thecemented lens element is more complex than that of the non-cemented lenselements. In particular, a second surface of one lens element and afirst surface of the following lens element need to have accuratecurvature to ensure these two lens elements will be highly cemented.However, during the cementing process, those two lens elements might notbe highly cemented due to displacement and it is thereby not favorablefor the image quality of the optical lens assembly. Therefore, accordingto the optical lens assembly of the present disclosure, the first lenselement, the second lens element, and the third lens element areindependent and non-cemented lens elements for improving the problemgenerated by the cemented lens elements.

When a curvature radius of the object-side surface of the first lenselement is R1, and the focal length of the optical lens assembly is f,the following condition is satisfied: 0<R1/f<0.40. Therefore, focalrange is converged since light beam passing through the optical lensassembly is controlled and the telephoto ability is then improved.

When an axial distance between the first lens element and the secondlens element is T12, and an axial distance between the second lenselement and the third lens element is T23, the following condition issatisfied: 0<T12/T23<1.0. Therefore, the space allocation of the lenselements can be balanced, and optical trace of light after sharplyrefracted can be alleviated since sufficient space between the secondlens element and the third lens element, and then the aberration can becorrected. Preferably, the following condition is satisfied:0<T12/T23<0.50.

When the focal length of the optical lens element is f, and a maximumimage height of the optical lens assembly is ImgH, the followingcondition is satisfied: 2.3<f/ImgH<4.5. Therefore, image range of theoptical lens assembly can be effectively suppressed for obtaining ahigher resolving power of local image.

When the focal length of the optical lens assembly is f, a focal lengthof the first lens element is f1, and a focal length of the second lenselement is f2, the following condition is satisfied:3.0<|f/f1|+|f/f2|<6.0. Therefore, the capability of controlling lightbeam is centered on the object side of the optical lens assembly, andthe image quality for narrowing view angle can be enhanced. Preferably,the following condition is satisfied: 3.65<|f/f1|+|f/f2|<6.0.

When the axial distance between the first lens element and the secondlens element is T12, and a central thickness of the second lens elementis CT2, the following condition is satisfied: 0<T12/CT2<0.80. Therefore,the space utilization ratio of the lens elements with refractive poweris increased and then space usage efficiency can be improved.

When a curvature radius of the image-side surface of the first lenselement is R2, and a curvature radius of the object-side of the secondlens element is R3, the following condition is satisfied:0.5<|(R2+R3)/(R2-R3)|<20. Therefore, the aberration of the optical lensassembly can be corrected.

When a half of a maximum field of view of the optical lens assembly isHFOV, the following condition in satisfied: 7.5 degrees<HFOV<23.5degrees. Therefore, a sufficient field of view can be obtained.

When a central thickness of the first lens element is CT1, and thecentral thickness of the second lens element is CT2, the followingcondition is satisfied: 0<CT1/CT2<1.65. Therefore, the moldability ofhomogeneity of the lens elements can be enhanced. Preferably, thefollowing condition is satisfied: 0<CT1/CT2<1.00.

When the axial distance between the object-side surface of the firstlens element and the image-side surface of the third lens element is TD,and the focal length of the optical lens assembly is f, the followingcondition is satisfied: 0.50<TD/f<0.90. Therefore, it is favorable formaking a balance between volume and ability of photo taking at distancerange of the optical lens assembly.

When the central thickness of the first lens element is CT1, the centralthickness of the second lens element is CT2, and a central thickness ofthe third lens element is CT3, the following condition is satisfied:1.30<(CT2+CT3)/CT1. Therefore, proper arrangement in thickness for thefirst lens element, the second lens element, and the third lens elementare favorable for assembling and manufacturing the optical lensassembly.

According to the optical lens assembly of the present disclosure, thefirst lens element, the second lens element, and the third lens elementcan be made of plastic, so that the manufacturing cost can beeffectively reduced.

When an axial distance between the image-side surface of the first lenselement and an image surface is TL, and the maximum image height of theoptical lens assembly is ImgH, the following condition is satisfied:2.0<TL/ImgH<3.5. Therefore, the compact size of the image capturingdevice is maintained and can be employed in compact electronic device.

When the curvature radius of the object-side surface of the second lenselement is R3, and the curvature radius of the image-side surface of thesecond lens element is R4, the following condition is satisfied:0.3<(R3+R4)/(R3−R4)<2.5. Therefore, the aberration can be furthercorrected.

When an entrance pupil diameter of the optical lens assembly is EPD, andthe maximum image height of the optical lens assembly is ImgH, thefollowing condition is satisfied: 0.90<EPD/ImgH<1.7. Therefore, imagequality of the optical lens assembly can be enhanced since thelight-receiving magnitude in a unit area of image is improved.

According to the optical lens assembly of the present disclosure, thelens elements can be made of glass, and when the lens elements are madeof glass material, the distribution of the refractive powers of theoptical lens assembly may be more flexible to design.

According to the optical lens assembly of the present disclosure, eachof an object-side surface and an image-side surface has a paraxialregion and an off-axis region. The paraxial region refers to the regionof the surface where light rays travel close to the optical axis, andthe off-axis region refers to the region of the surface away from theparaxial region. Particularly, when the lens element has a convexsurface, it indicates that the surface is convex in the paraxial regionthereof, and when the lens element has a concave surface, it indicatesthat the surface is concave in the paraxial region thereof. According tothe optical lens assembly of the present disclosure, the positiverefractive power or the negative refractive power of a lens element orthe focal length of the lens element, that is, refers to the refractivepower or the focal length in a paraxial region of the lens element.

According to the optical lens assembly of the present disclosure, theimage surface of the optical lens assembly, based on the correspondingimage sensor, can be flat or curve. For instant, the image surface canbe a curved surface being concave towards the object side.

According to the optical lens assembly of the present disclosure, theaperture stop can be configured as a front stop or middle stop. A frontstop disposed between an image object and the first lens element canprovided a longer distance between an exit pupil of the optical lensassembly and the image surface and thereby improve the image-sensingefficiency of the image sensor. A middle stop disposed between the firstlens element and the image surface is favorable for enlarging the fieldof the optical lens assembly and thereby provides a wider field of viewfor the same.

According to the present disclosure, an image capturing device isprovided. The image capturing device includes the aforementioned opticallens assembly and an image sensor. The image sensor is located at theimage side of the optical lens assembly. In the present invention,convergence of the optical lens assembly centers on the object side ofthe optical lens assembly since the first lens element with designablepositive refractive power, so that the optical lens is more compact andportable. The second lens element with designable negative refractivepower can effectively correct aberration generated by the first lenselement and can provide the designable convergence across differentwavelength range. Preferably, the image capturing device can furtherinclude a barrel member, a holding member or a combination thereof.

According to the above description of the present invention, thefollowing 1st-14th specific embodiments are provided for furtherexplanation.

1st Embodiment

FIG. 1 is a schematic view of an image capturing device according to 1stembodiment of the present invention. FIG. 2 shows spherical aberrationcurves, astigmatic field curves, and a distortion curve of the imagecapturing device according to the 1st embodiment. In FIG. 1, the imagecapturing device includes an optical lens assembly (in reference numeralis omitted) and an image sensor 160. The optical lens assembly includes,in order from an object side to an image side, an aperture stop 100, afirst lens element 110, a second lens element 120, a third lens element130, an IR-filter 140, and an image surface 150, wherein the imagesensor 160 is located at the image surface 150 of the optical lensassembly. The optical lens assembly has a total of three lens elements(110-130) with refractive power, and the first lens element 110, thesecond lens element 120, and the third lens element 130 are independentand non-cemented lens elements.

The first lens element 110 with positive refractive power has anobject-side surface 111 being convex and an image-side surface 112 beingconcave. The first lens element 110 is made of plastic material and hasthe object-side surface 111 and the image-side surface 112 being bothaspheric. The object-side surface 111 of the first lens element 110 hasthe largest curvature of all surfaces of lens elements in the opticallens assembly.

The second lens element 120 with negative refractive power has anobject-side surface 121 being convex and an image-side surface 122 beingconcave. The second lens element 120 is made of plastic material and hasthe object-side surface 121 and the image-side surface 122 being bothaspheric. A curvature of the second lens element 120 is increasinglyconcave from a paraxial region to an off-axis region thereof, and theimage-side surface 112 of the first lens element 110 and the object-sidesurface 121 of the second lens element 120 have the smallest curvatureof all surfaces of lens elements in the optical lens assembly.

The third lens element 130 with negative refractive power has anobject-side surface 131 being concave and an image-side surface 132being convex. The third lens element 130 is made of plastic material andhas the object-side surface 131 and the image-side surface 132 beingboth aspheric. A curvature of the object-side surface 131 of the thirdlens element 130 is increasingly concave from a paraxial region to anoff-axis region thereof.

The IR-filter 140 is made of glass material and located between thethird lens element 130 and the imaging surface 150, and will not affectthe focal length of the optical lens assembly.

The equation of the aspheric surface profiles of the aforementioned lenselements of the 1st embodiment is expressed as follows:

${{X(Y)} = {{\left( {Y^{2}\text{/}R} \right)\text{/}\left( {1 + {{sqrt}\left( {1 - {\left( {1 + k} \right) \times \left( {Y\text{/}R} \right)^{2}}} \right)}} \right)} + {\sum\limits_{i}{({Ai}) \times \left( Y^{i} \right)}}}},$

where,

X is the relative distance between a point on the aspheric surfacespaced at a distance Y from the optical axis and the tangential plane atthe aspheric surface vertex on the optical axis;

Y is the vertical distance from the point on the aspheric surface to theoptical axis;

R is the curvature radius;

k is the conic coefficient; and

Ai is the i-th aspheric coefficient.

In the optical lens assembly according to 1st embodiment, when a focallength of the optical lens assembly is f, a f-number of the optical lensassembly is Fno, and a half of maximum field of view of the optical lensassembly is HFOV, these parameters have the following value: f=6.2 mm,Fno=2.55, HFOV=17.1 degrees.

In the optical lens assembly according to 1st the embodiment, when anAbbe number of the first lens element 110 is V1, an Abbe number of thesecond lens element 120 is V2, and an Abbe number of the third lenselement 130 is V3, the following condition is satisfied:(V2+V3)/V1=0.77.

In the optical lens assembly according to the 1st embodiment, when acentral thickness of the first lens element 110 is CT1, and a centralthickness of the second lens element 120 is CT2, the following conditionis satisfied: CT1/CT2=0.80.

In the optical lens assembly according to the 1st embodiment, when thecentral thickness of the first lens element 110 is CT1, the centralthickness of the second lens element 120 is CT2, and a central thicknessof the third lens element 130 is CT3, the following condition issatisfied: (CT2+CT3)/CT1=2.25.

In the optical lens assembly according to the 1st embodiment, when anaxial distance between the first lens element 110 and the second lenselement 120 is T12, and the central thickness of the second lens elementis CT2, the following condition is satisfied: T12/CT2=0.12.

In the optical lens assembly according to the 1st embodiment, when theaxial distance between the first lens element 110 and the second lenselement 120 is T12, and an axial distance between the second lenselement 120 and the third lens element 130 is T23, the followingcondition is satisfied: T12/T23=0.09.

In the optical lens assembly according to the 1st embodiment, when acurvature radius of the object-side surface 111 of the first lenselement 110 is R1, and the focal length of the optical lens assembly isf, the following condition is satisfied: R1/f=0.25.

In the optical lens assembly according to the 1st embodiment, when thefocal length of the optical lens assembly is f, and a curvature radiusof the image-side surface 122 of the second lens element 120 is R4, thefollowing condition is satisfied: f/R4=2.80.

In the optical lens assembly according to the 1st embodiment, when acurvature radius of the object-side surface 131 of the third lenselement 130 is R5, and the focal length of the optical lens assembly isf, the following condition is satisfied: R5/f=−0.35.

In the optical lens assembly according to the 1st embodiment, when acurvature radius of the image-side surface 112 of the first lens element110 is R2, and a curvature radius of the object-side surface 121 of thesecond lens element 120 is R3, the following condition is satisfied:|(R2+R3)/(R2−R3)|=9.32.

In the optical lens assembly according to the 1st embodiment, when thecurvature radius of the object-side surface 121 of the second lenselement 120 is R3, and the curvature radius of the image-side surface122 of the second lens element 120 is R4, the following condition issatisfied: (R3+R4)/(R3−R4)=1.49.

In the optical lens assembly according to the 1st embodiment, when thefocal length of the optical lens assembly is f, a focal length of thefirst lens element 110 is f1, and a focal length of the second lenselement 120 is f2, the following condition is satisfied:|f/f1|+|f/f2|=3.38.

In the optical lens assembly according to the 1st embodiment, when anaxial distance between the aperture stop 100 and the image-side surface132 of the third lens element 130 is SD, and an axial distance betweenthe object-side surface 111 of the first lens element 110 and theimage-side surface 132 of the third lens element 130 is TD, thefollowing condition is satisfied: SD/TD=0.84.

In the optical lens assembly according to the 1st embodiment, when theaxial distance between the object-side surface 111 of the first lenselement 110 and the image-side surface 132 of the third lens element 130is TD, and the focal length of the optical lens assembly is f, thefollowing condition is satisfied: TD/f=0.59.

In the optical lens assembly according to the 1st embodiment, when thefocal length of the optical lens assembly is f, and a maximum imageheight of the optical lens assembly is ImgH, the following condition issatisfied: f/ImgH=3.10.

In the optical lens assembly according to the 1st embodiment, when anentrance pupil diameter of the optical lens assembly is EDP, and themaximum image height of the optical lens assembly is ImgH, the followingcondition is satisfied: EPD/ImgH=1.22.

In the optical lens assembly according to the 1st embodiment, when anaxial distance between the object-side surface 111 of the first lenselement 110 and the image surface 150 is TL, and the maximum imageheight of the optical lens assembly is ImgH, the following condition issatisfied: TL/ImgH=2.95.

The detail optical data of the 1st embodiment are shown in Table 1 andthe aspheric surface data are shown in Table 2 below.

TABLE 1 1st Embodiment f = 6.20 mm, Fno = 2.55, HFOV = 17.1 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Ape. Stop Plano −0.585  2 Lens 1 1.525 ASP 0.727Plastic 1.535 55.7 3.14 3 13.991 ASP 0.112 4 Lens 2 11.280 ASP 0.908Plastic 1.650 21.4 −4.41 5 2.214 ASP 1.187 6 Lens 3 −2.163 ASP 0.726Plastic 1.650 21.4 −46.84 7 −2.636 ASP 0.500 8 IR-filter Plano 0.320Glass 1.517 64.2 — 9 Plano 1.411 10 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 2 Aspheric Coefficients Surface # 2 3 4 k= −8.2205E−01 5.0845E+014.3548E+01 A4=  1.6956E−02 2.5999E−03 1.6154E−03 A6=  3.3935E−02−9.0941E−03  5.5083E−03 A8= −4.4661E−02 2.7311E−03 −1.6720E−02  A10= 3.3323E−02 1.4068E−02 2.6529E−02 A12= −7.8128E−03 −8.3165E−03 −1.3024E−02  Surface # 5 6 7 k= −6.3220E+01  2.1877E+00  3.3979E−01 A4= 7.1906E−01 −2.8926E−02 −2.3707E−02 A6= −2.4242E+00 −6.1637E−02−2.6920E−02 A8=  6.9441E+00  1.5025E−01  3.6546E−02 A10= −1.1589E+01−1.7933E−01 −2.9948E−02 A12=  1.0320E+01  8.9214E−02  1.1174E−02 A14=−3.6147E+00 −2.5449E−04 −1.5638E−03

In Table 1, the curvature radius, the thickness, and the focal lengthare shown in millimeter (mm). Surface number 0-10 represent the surfacessequentially arranged from the object-side to the image-side along theoptical axis. In Table 2, k represents the conic coefficient of theequation of the aspheric surface profiles. A4-A14 represent the asphericcoefficients ranging from the 4th order to the 14th order. The tablespresented below for each embodiment are the corresponding schematicparameter and aberration curves, and the definitions of the tables arethe same as Table 1 and Table 2 of the 1st embodiment. Therefore, anexplanation in this regard will not be provided again.

2nd Embodiment

FIG. 3 is a schematic view of an image capturing device according to the2nd embodiment of the present disclosure. FIG. 4 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves, anda distortion curve of the image capturing device according to the 2ndembodiment. In FIG. 3, the image capturing device includes an opticallens assembly (its refer numeral is omitted) and an image sensor 260.The optical lens assembly includes, in order from an object side to animage side, a first lens element 210, an aperture stop 200, a secondlens element 220, a third lens element 230, an IR-filter 240, and animage surface 250. The image sensor 260 is located at the image surface250 of the optical lens assembly. The optical lens assembly has a totalof three lens elements (210-230) with refractive power, and the firstlens element 210, the second lens element 220, and the third lenselement 230 are independent and non-cemented lens elements.

The first element 210 with positive refractive power has an object-sidesurface 211 being convex and an image-side surface 212 being concave.The first lens element 210 is made of plastic material and has theobject-side surface 211 and the image-side surface 212 being bothaspheric. The image-side surface 211 of the first lens element 210 hasthe largest curvature of all surfaces of lens elements in the opticallens assembly.

The second lens element 220 with negative power refractive has anobject-side surface 221 being convex and an image-side surface 222 beingconcave. The second lens element 220 is made of plastic material and theobject-side surface 221 and the image-side surface 222 being bothaspheric. A curvature of the image-side surface 222 of the second lenselement 220 is increasingly concave from a paraxial region to anoff-axis region thereof, and the image-side surface 212 of the firstlens element 210 and the object-side surface 221 of the second lenselement 220 have the smallest curvature of all surfaces of lens elementsin the optical lens assembly.

The third lens element 230 with positive refractive power has anobject-side surface 231 being concave and an image-side surface 232being convex. The third lens element 230 is made of plastic material andthe object-side surface 231 and the image-side surface 232 are bothaspheric. A curvature of the object-side surface 231 of the third lenselement 230 is increasingly concave from a paraxial region to anoff-axis region thereof.

The IR-filter 240 is made of glass material and located between thethird lens element 230 and the image surface 250, and will not affect afocal length of the optical lens assembly.

The detailed optical data of the 2nd embodiment are shown in Table 3 andthe aspheric surface data are shown in Table 4 below.

TABLE 3 2nd Embodiment f = 3.88 mm, Fno = 2.55, HFOV = 17.6 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Lens 1 0.948 ASP 0.521 Plastic 1.544 55.9 1.81 2 19.628ASP 0.040 3 Ape. Stop Plano 0.040 4 Lens 2 15.631 ASP 0.435 Plastic1.639 23.5 −2.44 5 1.402 ASP 0.808 6 Lens 3 −1.102 ASP 0.580 Plastic1.614 25.6 105.84 7 −1.301 ASP 0.200 8 IR-filter Plano 0.210 Glass 1.51764.2 — 9 Plano 0.923 10 Image Plano — Note: Reference wavelength is587.6 nm (d-line).

TABLE 4 Aspheric Coefficients Surface # 1 2 4 k= −8.0120E−01  3.8512E+01−6.8783E+01 A4=  6.5650E−02 −4.9348E−02 −2.4327E−02 A6=  3.2079E−01−6.7973E−02  2.1246E−02 A8= −9.5614E−01  3.7366E−02 −1.3059E−01 A10= 1.5990E+00  6.4102E−01  1.5257E+00 A12= −9.9983E−01 −7.4734E−01−1.7160E+00 Surface # 5 6 7 k= −6.1677E+01 1.0694E+00 −4.7100E−01 A4= 2.7293E+00 −1.3622E−01  −8.3913E−02 A6= −2.1292E+01 −4.5937E−01 −2.9285E−01 A8=  1.4514E+02 2.4984E+00  8.7166E−01 A10= −5.8020E+02−7.7323E+00  −1.6137E+00 A12=  1.2666E+03 9.8472E+00  1.3880E+00 A14=−1.0836E+03 3.2278E+00 −4.5135E−01

In the 2nd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 2nd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 3 and Table 4 asthe following values and satisfy the following conditions:

2nd Embodiment f [mm] 3.88 R5/f −0.28 Fno 2.55 |(R2 + R3)/(R2 − R3)|8.82 HFOV [deg.] 17.6 (R3 + R4)/(R3 − R4) 1.20 (V2 + V3)/V1 0.88|f/f1| + |f/f2| 3.73 CT1/CT2 1.20 SD/TD 0.77 (CT2 + CT3)/CT1 1.95 TD/f0.62 T12/CT2 0.18 f/ImgH 2.99 T12/T23 0.10 EPD/ImgH 1.17 R1/f 0.24TL/ImgH 2.89 f/R4 2.77

3rd Embodiment

FIG. 5 is a schematic view of an image capturing device according to the3rd embodiment of the present disclosure. FIG. 6 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves, anda distortion curve of the image capturing device according to the 3rdembodiment. In FIG. 5, the image capturing device includes an opticallens assembly (its reference numeral is omitted) and an image sensor360. The optical lens assembly includes, in order from an object side toan image side, a first lens element 310, an aperture stop 300, a secondlens element 320, a third lens element 330, an IR-filter 340, and animage surface 350, wherein the image sensor 360 is located at the imagesurface 350 of the optical lens assembly. The optical lens assembly hasa total of three lens elements (310-330) with refractive power, and thefirst lens element 310, the second lens element 320, and the third lenselement 330 are independent and non-cemented lens elements.

The first lens element 310 with positive refractive power has anobject-side surface 311 being convex and an image-side surface 312 beingconvex. The first lens element 310 is made of plastic material and theobject-side surface 311 and the image-side surface 312 are bothaspheric. The object-side surface 311 of the first lens element 310 hasthe largest curvature of all surfaces of lens elements in the opticallens assembly.

The second lens element 320 with negative refractive power has anobject-side surface 321 being concave and an image-side surface 322being concave. The second lens element 320 is made of plastic materialand has the object-side surface 321 and the image-side surface 322 beingboth aspheric. A curvature of the image-side surface 322 of the secondlens element 320 is increasingly concave from a paraxial region to anoff-axis region thereof, and the image-side surface 312 of the firstlens element 310 and the object-side surface 321 of the second lenselement 320 have the smallest curvature of all surfaces of lens elementsin the optical lens assembly.

The third lens element 330 with negative refractive power has anobject-side surface 331 being concave and an image-side surface 332being convex. The third lens element 330 is made of plastic material hasthe object-side surface 331 and the imaging side-surface 332 being bothaspheric. A curvature of the object-side surface 331 of the third lenselement 330 is increasingly concave from a paraxial region to anoff-axis region thereof.

The IR-filter 340 is made of glass and located between the third lenselement 330 and the image surface 350, and will not affect a focallength of the optical lens assembly.

The detailed optical data of the 3rd embodiment are shown in Table 5 andthe aspheric surface data are shown in Table 6 below.

TABLE 5 3rd Embodiment f = 4.10 mm, Fno = 2.60, HFOV =16.6 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Lens 1 1.071 ASP 0.562 Plastic 1.544 55.9 1.89 2−21.834 ASP 0.042 3 Ape. Stop Plano 0.040 4 Lens 2 −49.982 ASP 0.734Plastic 1.639 23.5 −2.19 5 1.450 ASP 0.877 6 Lens 3 −1.296 ASP 0.430Plastic 1.614 25.6 −44.14 7 −1.533 ASP 0.200 8 IR-filter Plano 0.210Glass 1.517 64.2 — 9 Plano 0.738 10 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 6 Aspheric Coefficients Surface # 1 2 4 k= −9.5300E−01 −2.8807E+01 9.0000E+01 A4=  4.6598E−02 −1.4902E−02 −2.5988E−02 A6=  2.9162E−01 3.3203E−02  1.0968E−01 A8= −8.8018E−01  9.2165E−02 −2.2558E−01 A10= 1.4400E+00 −2.0531E−01  4.0544E−01 A12= −8.4453E−01  2.5333E−02−4.7403E−01 Surface # 5 6 7 k= −6.1739E+01  1.5098E+00  3.4679E−01 A4= 2.5578E+00 −2.0719E−01 −1.6727E−01 A6= −2.1221E+01 −5.5605E−01−2.1222E−01 A8=  1.4656E+02  3.2986E+00  8.0169E−01 A10= −5.9063E+02−1.0241E+01 −1.5422E+00 A12=  1.2666E+03  1.3739E+01  1.1937E+00 A14=−1.0836E+03 −3.3679E+00 −2.8380E−01

In the 3rd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 3rd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 5 and Table 6 asthe following values and satisfy the following conditions:

3rd Embodiment f [mm] 4.10 R5/f −0.32 Fno 2.60 |(R2 + R3)/(R2 − R3)|2.55 HFOV [deg.] 16.6 (R3 + R4)/(R3 − R4) 0.94 (V2 + V3)/V1 0.88|f/f1| + |f/f2| 4.03 CT1/CT2 0.77 SD/TD 0.78 (CT2 + CT3)/CT1 2.08 TD/f0.66 T12/CT2 0.11 f/ImgH 3.16 T12/T23 0.09 EPD/ImgH 1.22 R1/f 0.26TL/ImgH 2.96 f/R4 2.83

4th Embodiment

FIG. 7 is a schematic view of an image capturing device according to the4th embodiment of the present disclosure. FIG. 8 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves, anda distortion curve of the image capturing device according to the 4thembodiment. In FIG. 7, the image capturing device includes an opticallens assembly (its reference numeral is omitted) and an image sensor460. The optical lens assembly includes, from an object side to an imageside, an aperture stop 400, a first lens element 410, a second lenselement 420, a third lens element 430, an IR-filter 440, and an imagesurface 450, wherein the image sensor 460 is located at the imagesurface 450 of the optical lens assembly. The optical lens assembly hasa total number of three lens elements (410-430) with refractive power,and the first lens element 410, the second lens element 420, and thethird lens element 430 are independent and non-cemented lens elements.

The first lens element 410 with positive refractive power has anobject-side surface 411 being convex and an imaging-side surface 412being convex. The first lens element 410 is made of plastic material andhas the object-side surface 411 and the image-side surface 412 beingboth aspheric. The image-side surface 411 of the first lens element 410has the largest curvature of all surfaces of lens elements in theoptical lens assembly.

The second lens element 420 with negative refractive power has anobject-side surface 421 being concave and an image-side surface 422being concave. The second lens element 420 is made of plastic materialand has the object-side surface 421 and the image-side surface 422 beingboth aspheric. A curvature of the image-side surface 422 of the secondlens element 420 is increasingly concave from a paraxial region to anoff-axis region thereof. The image-side surface 412 of the first lenselement 410 and the object-side surface 421 of the second lens element420 have the smallest curvature of all surfaces of lens elements in theoptical lens assembly.

The third lens element 430 with negative refractive power has anobject-side surface 431 being concave and an image-side surface 432being convex. The third lens element 430 is made of plastic material andhas the object-side surface 431 and the image-side surface 432 beingboth aspheric. A curvature of the object-side surface 431 of the thirdlens element 430 is increasingly concave from a paraxial region to anoff-axis region thereof.

The IR-filter 440 is made of glass material and located between thethird lens element 430 and the image surface 450, and will not affect afocal length of the optical lens assembly.

The detailed optical data of the 4th embodiment are shown in Table 7 andthe aspheric surface data are shown in Table 8 below.

TABLE 7 4th Embodiment f = 3.67 mm, Fno = 2.43, HFOV = 20.3 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Ape. Stop Plano −0.280  2 Lens 1 1.144 ASP 0.476Plastic 1.544 55.9 1.79 3 −5.629 ASP 0.080 4 Lens 2 −10.909 ASP 0.891Plastic 1.639 23.5 −2.04 5 1.530 ASP 0.730 6 Lens 3 −8.722 ASP 0.694Plastic 1.639 23.5 −25.35 7 −19.481 ASP 0.000 8 Stop Plano 0.200 9IR-filter Plano 0.210 Glass 1.517 64.2 — 10 Plano 0.445 11 Image Plano —Note: Reference wavelength is 587.6 nm (d-line). Effective radius ofSurface 8 is 1.143 mm.

TABLE 8 Aspheric Coefficients Surface # 2 3 4 k= −1.0377E+00 −5.3155E+019.0000E+01 A4=  3.3692E−02  1.0478E−01 1.3918E−01 A6=  3.1509E−01 3.8199E−02 9.6230E−02 A8= −9.9460E−01 −1.9832E−01 −4.1739E−01  A10= 1.7197E+00  8.2316E−01 8.2958E−01 A12= −9.8790E−01 −1.0114E+00−1.0153E+00  Surface # 5 6 7 k= −7.4101E+01 9.3183E+00 6.5346E+01 A4= 2.5404E+00 9.6762E−03 4.6102E−02 A6= −2.1470E+01 −1.0889E+00 −6.7214E−01  A8=  1.4803E+02 3.8971E+00 1.4048E+00 A10= −5.9528E+02−7.6961E+00  −1.6242E+00  A12=  1.2666E+03 8.4045E+00 9.6282E−01 A14=−1.0836E+03 −3.6295E+00  −2.2096E−01 

In the 4th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 4th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 7 and Table 8 asthe following values and satisfy the following conditions:

4th Embodiment f [mm] 3.67 R5/f −2.37 Fno 2.43 |(R2 + R3)/(R2 − R3)|3.13 HFOV [deg.] 20.3 (R3 + R4)/(R3 − R4) 0.75 (V2 + V3)/V1 0.84|f/f1| + |f/f2| 3.85 CT1/CT2 0.53 SD/TD 0.90 (CT2 + CT3)/CT1 3.33 TD/f0.78 T12/CT2 0.09 f/ImgH 2.53 T12/T23 0.11 EPD/ImgH 1.04 R1/f 0.31TL/ImgH 2.57 f/R4 2.40

5th Embodiment

FIG. 9 is a schematic view of an image capturing device according to the5th embodiment of the present disclosure. FIG. 10 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves, anda distortion curve of the image capturing device according to the 5thembodiment. In FIG. 9, the image capturing device includes an opticallens assembly (its reference numeral is omitted) and an image sensor560. The optical lens assembly includes, from an object side to an imageside, an aperture stop 500, a first lens element 510, a second lenselement 520, a third lens element 530, an IR-filter 540, and an imagesurface 550, wherein the image sensor 560 is located at the imagesurface 550. The optical lens assembly has a total of three lenselements (510-530) with refractive power, and the first lens element510, the second lens element 520, and the third lens element 530 areindependent and non-cemented lens elements.

The first lens element 510 with positive refractive power has anobjective-side surface 511 being convex and an image-side surface 512being convex. The first lens element 510 is made of plastic material andhas the object-side surface 511 and the image-side surface 512 beingboth aspheric. The object-side surface 511 of the first lens element 510has the largest curvature of all surfaces of lens elements in theoptical lens assembly.

The second lens element 520 with negative refractive power has anobject-side surface 521 being concave and an image-side surface 522being concave. The second lens element 520 is made of plastic materialand has the object-side surface 521 and the image-side surface 522 beingboth aspheric. A curvature of the image-side surface 522 of the secondlens element 520 is increasingly concave from a paraxial region to anoff-axis region thereof, and the image-side surface 512 of the firstlens element 510 and the object-side surface 521 of the second lenselement 520 have the smallest curvature of all surfaces of lens elementsin the optical lens assembly.

The third lens element 530 with negative refractive power has anobject-side surface 531 being concave and an image-side surface 532being convex. The third lens element 530 is made of plastic material andhas the object-side surface 531 and the image-side surface 532 beingboth aspheric. A curvature of the object-side surface 531 of the thirdlens element 530 is increasingly concave from a paraxial region to anoff-axis region thereof.

The IR-filter 540 is made of glass material and located between thethird lens element 530 and the image surface 550, and will not affect afocal length of the optical lens assembly.

The detailed optical data of the 5th embodiment are shown in Table 9 andthe aspheric surface data are shown in Table 10 below.

TABLE 9 5th Embodiment f = 3.71 mm, Fno = 2.50, HFOV = 18.6 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Ape. Stop Plano −0.295  2 Lens 1 1.045 ASP 0.527Plastic 1.544 55.9 1.69 3 −6.397 ASP 0.080 4 Lens 2 −10.940 ASP 0.765Plastic 1.639 23.5 −2.06 5 1.540 ASP 0.468 6 Lens 3 −1.778 ASP 0.905Plastic 1.583 30.2 −26.58 7 −2.384 ASP 0.200 8 IR-filter Plano 0.210Glass 1.517 64.2 — 9 Plano 0.571 10 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 10 Aspheric Coefficients Surface # 2 3 4 k= −8.6676E−01−9.2674E+00 9.0000E+01 A4=  4.9625E−02  9.1615E−02 8.4067E−02 A6= 2.9420E−01 −1.0048E−02 3.1589E−02 A8= −9.5789E−01 −2.7309E−01−4.1253E−01  A10=  1.7697E+00  8.4430E−01 1.0444E+00 A12= −1.1649E+00−9.4767E−01 −1.1491E+00  Surface # 5 6 7 k= −9.0000E+01 5.0852E+00−5.7943E−02 A4=  2.5904E+00 −1.8619E−01  −5.6141E−02 A6= −2.1869E+01−6.6358E−01  −3.8961E−01 A8=  1.4757E+02 3.8243E+00  1.0387E+00 A10=−5.8822E+02 −1.1742E+01  −1.5453E+00 A12=  1.2667E+03 5.1203E+00 1.1266E+00 A14= −1.0836E+03 2.6862E+01 −3.2690E−01

In the 5th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 5th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 9 and Table 10as the following values and satisfy the following conditions:

5th Embodiment f [mm] 3.71 R5/f −0.48 Fno 2.50 |(R2 + R3)/(R2 − R3)|3.82 HFOV [deg.] 18.6 (R3 + R4)/(R3 − R4) 0.75 (V2 + V3)/V1 0.96|f/f1| + |f/f2| 3.99 CT1/CT2 0.69 SD/TD 0.89 (CT2 + CT3)/CT1 3.17 TD/f0.74 T12/CT2 0.11 f/ImgH 2.85 T12/T23 0.17 EPD/ImgH 1.14 R1/f 0.28TL/ImgH 2.87 f/R4 2.41

6th Embodiment

FIG. 11 is a schematic view of an image capturing device according tothe 6th embodiment of the present disclosure. FIG. 12 shows, in orderfrom left to right, spherical aberration curves, astigmatic fieldcurves, and a distortion curve of the image capturing device accordingto the 6th embodiment. In FIG. 11, the image capturing device includesan optical lens assembly (its reference numeral is omitted) and an imagesensor 660. The optical lens assembly includes, in order from an objectside to an image side, a first lens element 610, an aperture stop 600, asecond lens element 620, a third lens element 630, an IR-filter 640, andan image surface 650, wherein the image sensor 660 is located at theimage surface 650. The optical lens assembly has a total of three lenselements (610-630), and the first lens element 610, the second lenselement 620, and the third lens element 630 are independent andnon-cemented lens elements.

The first lens element 610 with positive refractive power has anobject-side surface 611 being convex and an image-side surface 612 beingconvex. The first lens element 610 is made of plastic and has theobject-side surface 611 and the image-side surface 612 being bothaspheric. The object-side surface 611 of the first lens element 610 hasthe largest curvature of all surfaces of lens elements in the opticallens assembly.

The second lens element 620 with negative refractive power has anobject-side surface 621 being concave and an image-side surface 622being concave. The second lens element 620 is made of plastic materialand has the object-side surface 621 and the image-side surface 622 beingboth aspheric. A curvature of the image-side surface 622 of the secondlens element 620 is increasingly concave from a paraxial region to anoff-axis region thereof, and the image-side surface 612 of the firstlens element 610 and the object-side surface 621 of the second lenselement 620 have the smallest curvature of all surfaces of lens elementsin the optical lens assembly.

The third lens element 630 with negative refractive power has anobject-side surface 631 being concave and an image-side surface 632being convex. The third lens element 630 is made of plastic material andhas the object-side surface 631 and the image-side surface 632 beingboth aspheric. A curvature of the object-side surface 631 of the thirdlens element 630 is increasingly concave from a paraxial region to anoff-axis region thereof.

The IR-filter 640 is made of glass material and is located between thethird lens element 630 and the image surface 650, and will not affect afocal length of the optical lens assembly.

The detailed optical data of the 6th embodiment are shown in Table 11and the aspheric surface data are shown in Table 12 below.

TABLE 11 6th Embodiment f = 3.74 mm, Fno = 2.65, HFOV = 19.8 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 1.019 ASP 0.897 Plastic 1.544 55.9 1.832 −29.138 ASP 0.043 3 Ape. Stop Plano 0.040 4 Lens 2 −21.304 ASP 0.398Plastic 1.650 21.4 −2.72 5 1.942 ASP 0.386 6 Lens 3 −1.327 ASP 0.913Plastic 1.650 21.5 −20.02 7 −1.878 ASP 0.300 8 IR-filter Plano 0.210Glass 1.517 64.2 — 9 Plano 0.664 10 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 12 Aspheric Coefficients Surface # 1 2 4 k= −8.4746E−01 8.9755E+01 2.9088E+01 A4=  6.0185E−02 −4.0702E−02 −3.5025E−02  A6= 2.3180E−01  1.9275E−02 1.8905E−02 A8= −7.1377E−01 −2.0031E−011.6390E−01 A10=  1.2625E+00 −1.1922E+00 −2.7786E+00  A12= −8.3928E−01 2.3049E+00 5.0390E+00 Surface # 5 6 7 k= −9.0000E+01 2.0093E+00−9.3330E−01 A4=  1.8765E+00 −1.6625E−01  −5.2710E−02 A6= −1.6625E+01−5.7407E−01  −2.7752E−01 A8=  1.2879E+02 3.3326E+00  8.3666E−01 A10=−5.5827E+02 −1.1696E+01  −1.4095E+00 A12=  1.2666E+03 1.8123E+01 1.1764E+00 A14= −1.0836E+03 2.3398E+01 −3.8722E−01

In the 6th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 6th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 11 and Table 12as the following values and satisfy the following conditions:

6th Embodiment f [mm] 3.74 R5/f −0.36 Fno 2.65 |(R2 + R3)/(R2 − R3)|6.44 HFOV [deg.] 19.8 (R3 + R4)/(R3 − R4) 0.83 (V2 + V3)/V1 0.77|f/f1| + |f/f2| 3.42 CT1/CT2 2.25 SD/TD 0.65 (CT2 + CT3)/CT1 1.46 TD/f0.72 T12/CT2 0.21 f/ImgH 2.58 T12/T23 0.22 EPD/ImgH 0.97 R1/f 0.27TL/ImgH 2.66 f/R4 1.92

7th Embodiment

FIG. 13 is a schematic view of an image capturing device according tothe 7th embodiment of the present disclosure. FIG. 14 shows, in orderfrom left to right, spherical aberration curves, astigmatic fieldcurves, and a distortion curve of the image capturing device accordingto the 7th embodiment. In FIG. 13, the imaging device includes anoptical lens assembly (its reference numeral is omitted) and an imagesensor 760. The optical lens assembly includes, in order from an objectside to an image side, an aperture stop 700, a first lens element 710, asecond lens element 720, a third lens element 730, an IR-filter 740, andan image surface 750, wherein the image sensor 760 is located at theimage surface 750. The optical lens assembly has a total of three lenselements (710-730) with refractive power, and the first lens element710, the second lens element 720, and the third lens element 710-730 areindependent and non-cemented lens elements.

The first lens element 710 with positive refractive power has anobject-side surface 711 being convex and an image-side surface 712 beingconvex. The first lens element 710 is made of plastic material and hasthe object-side surface 711 and the image-side surface 712 being bothaspheric. The object-side surface 711 of the first lens element 710 hasthe largest curvature of all surfaces of lens elements in the opticallens assembly.

The second lens element 720 with negative refractive power has anobject-side surface 721 being concave and an image-side surface 722being concave. The second lens element 720 is made of plastic materialand has the object-side surface 721 and the image-side surface 722 beingboth aspheric. A curvature of the image-side surface 722 of the secondlens element 720 is increasingly concave from a paraxial region to anoff-axis region thereof, and the image surface 712 of the first lenselement 710 and the object-side surface 721 of the second lens element720 have the smallest curvature of all surfaces of lens elements in theoptical lens assembly.

The third lens element 730 with negative refractive power and has anobject-side surface 731 being concave and an image-side surface 732being convex. The third lens element 730 is made of plastic material andhas the object-side surface 731 and the image-side surface 732 beingboth aspheric. A curvature of the object-side surface 731 of the thirdlens element 730 is increasingly concave from a paraxial region to anoff-axis region thereof.

The IR-filter 740 is made of glass material and is located between thethird lens element 730 and the image surface 750, and will not affect afocal length of the optical lens assembly.

The detailed optical data of the 7th embodiment are shown in Table 13and the aspheric surface data are shown in Table 14 below.

TABLE 13 7th Embodiment f = 3.72 mm, Fno = 2.70, HFOV = 18.6 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Ape. Stop Plano −0.242  2 Lens 1 1.074 ASP0.460 Plastic 1.535 55.7 1.80 3 −8.134 ASP 0.080 4 Lens 2 −26.845 ASP1.000 Plastic 1.650 21.5 −2.29 5 1.598 ASP 0.396 6 Lens 3 −1.731 ASP1.000 Plastic 1.535 55.7 −12.56 7 −2.801 ASP 0.200 8 IR-filter Plano0.210 Glass 1.517 64.2 — 9 Plano 0.381 10 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 14 Aspheric Coefficients Surface # 2 3 4 k= −8.5313E−01 9.0000E+01 6.8053E+01 A4=  5.4283E−02 3.4274E−03 −5.7314E−02 A6=  2.2277E−014.7082E−02  2.6602E−02 A8= −9.2927E−01 −6.4559E−01  −3.3582E−01 A10= 1.8545E+00 2.3698E+00  1.8343E+00 A12= −1.3577E+00 −2.3609E+00 −2.1992E+00 Surface # 5 6 7 k= −9.0000E+01  1.9949E+00  2.7724E+00 A4= 2.2856E+00 −3.8531E−01 −1.5014E−01 A6= −2.0815E+01 −1.8537E+00−2.1834E−01 A8=  1.4298E+02  6.0810E+00  5.9345E−01 A10= −5.8251E+02−2.2524E+00 −8.1872E−01 A12=  1.2667E+03 −9.5794E+01  5.4634E−01 A14=−1.0836E+03  2.0605E+02 −1.4227E−01

In the 7th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 7th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 13 and Table 14as the following values and satisfy the following conditions:

7th Embodiment f [mm] 3.72 R5/f −0.47 Fno 2.70 |(R2 + R3)/(R2 − R3)|1.87 HFOV [deg.] 18.6 (R3 + R4)/(R3 − R4) 0.89 (V2 + V3)/V1 1.39|f/f1| + |f/f2| 3.69 CT1/CT2 0.46 SD/TD 0.92 (CT2 + CT3)/CT1 4.35 TD/f0.79 T12/CT2 0.08 f/ImgH 2.87 T12/T23 0.20 EPD/ImgH 1.06 R1/f 0.29TL/ImgH 2.88 f/R4 2.33

8th Embodiment

FIG. 15 is a schematic view of an image capturing device according tothe 8th embodiment of the present disclosure. FIG. 16 shows, in orderfrom left to right, spherical aberration curves, astigmatic fieldcurves, and a distortion curve of the image capturing device accordingto the 8th embodiment. In FIG. 15, the image capturing device includesan optical lens assembly (its reference numeral is omitted) and an imagesensor 860. The optical lens assembly includes, in order from an objectside to an image side, an aperture atop 800, a first lens element 810, asecond lens element 820, a third lens element 830, an IR-filter 840, andan image surface 850, wherein the image sensor 860 is located at theimage surface 850. The optical lens assembly has a total of three lenselements (810-830) with refractive power, and the first lens element810, the second lens element 820, and the third lens element 830 areindependent and non-cemented lens elements.

The first lens element 810 with positive refractive power has anobject-side surface 811 being convex and an image-side surface 812 beingconvex. The first lens element 810 is made of plastic material and hasthe object-side surface 811 and the image-side surface 812 being bothaspheric. The object-side surface 811 of the first lens element 810 hasthe largest curvature of all surfaces of lens elements in the opticallens assembly.

The second lens element 820 with negative refractive power has anobject-side surface 821 being concave and an image-side surface 822being concave. The second lens element 820 is made of plastic materialand has the object-side surface 821 and the image-side surface 822 beingboth aspheric. A curvature of the image-side surface 822 of the secondlens element 820 is increasingly concave from a paraxial region to anoff-axis region thereof, and the image-side surface 812 of the firstlens element 810 and the object-side surface 821 of the second lenselement 820 have the smallest curvature of all surfaces of lens elementsin the optical lens assembly.

The third lens element 830 with negative refractive power has anobject-side surface 831 being concave and an image-side surface 832being convex. The third lens element 830 is made of plastic material andhas the object-side surface 831 and the image-side surface 832 beingboth aspheric. A curvature of the object-side surface 831 of the thirdlens element 830 is increasingly concave from a paraxial region to anoff-axis region thereof.

The IR-filter 840 is made of glass material and located between thethird lens element 830 and the image surface 850, and will not affect afocal length of the optical lens assembly.

The detailed optical data of the 8th embodiment are shown in Table 15and the aspheric surface data are shown in Table 16 below.

TABLE 15 8th Embodiment f = 3.99 mm, Fno = 2.43, HFOV = 17.6 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Ape. Stop Plano −0.370  2 Lens 1 1.046 ASP0.549 Plastic 1.544 55.9 1.79 3 −11.416 ASP 0.083 4 Lens 2 −9.989 ASP0.623 Plastic 1.639 23.5 −2.16 5 1.640 ASP 1.159 6 Lens 3 −2.348 ASP0.505 Plastic 1.639 23.5 −12.60 7 −3.593 ASP 0.200 8 IR-filter Plano0.210 Glass 1.517 64.2 — 9 Plano 0.393 10 Image Plano — Note: Referencewavelength is 587.6 nm (d-line). Effective radius of Surface 5 is 0.570mm.

TABLE 16 Aspheric Coefficients Surface # 2 3 4 k= −9.8183E−01 4.1673E+013.1824E+01 A4=  3.9497E−02 9.6055E−02 1.6607E−01 A6=  3.3371E−015.1733E−02 1.2189E−01 A8= −1.0291E+00 −1.4696E−01  −3.8760E−01  A10= 1.6446E+00 7.7619E−01 9.2530E−01 A12= −8.8510E−01 −9.5869E−01 −1.1126E+00  Surface # 5 6 7 k= −8.9880E+01 6.3861E−01 −5.7821E+00 A4= 2.6107E+00 5.7408E−02  4.4694E−03 A6= −2.1137E+01 −1.3229E+00 −7.1468E−01 A8=  1.4730E+02 4.1269E+00  1.4575E+00 A10= −5.9323E+02−7.1585E+00  −1.6358E+00 A12=  1.2666E+03 6.9024E+00  9.5921E−01 A14=−1.0836E+03 −2.6428E+00  −2.1527E−01

In the 8th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 8th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 15 and Table 16as the following values and satisfy the following conditions:

8th Embodiment f [mm] 3.99 R5/f −0.59 Fno 2.43 |(R2 + R3)/(R2 − R3)|15.00 HFOV [deg.] 17.6 (R3 + R4)/(R3 − R4) 0.72 (V2 + V3)/V1 0.84|f/f1| + |f/f2| 4.08 CT1/CT2 0.88 SD/TD 0.87 (CT2 + CT3)/CT1 2.06 TD/f0.73 T12/CT2 0.13 f/ImgH 3.08 T12/T23 0.07 EPD/ImgH 1.27 R1/f 0.26TL/ImgH 2.87 f/R4 2.43

9th Embodiment

FIG. 17 is a schematic view of an image capturing device according tothe 9th embodiment of the present disclosure. FIG. 18 shows, in orderfrom left to right, spherical aberration curves, astigmatic fieldcurves, and a distortion curve of the image capturing device accordingto the 9th embodiment. In FIG. 17, the image capturing device includesan optical lens assembly (its reference numeral is omitted) and an imagesensor 960. The optical lens assembly includes, in order from an objectside to an image side, an aperture stop 900, a first lens element 910, asecond lens element 920, a third lens element 930, an IR-filter 940, andan image surface 950, wherein the image sensor 960 is located at theimage surface 950 of the optical lens assembly. The optical lensassembly has a total of three lens elements (910-930), and the firstlens element 910, the second lens element 920, and the third lenselement 930 are independent and non-cemented lens elements.

The first lens element 910 with positive refractive power has anobject-side surface 911 being convex and an image-surface 912 beingconvex. The first lens element 910 is made of plastic and has theobject-side surface 911 and the image-side surface 912 being bothaspheric. The object-side surface 911 of the first lens element 910 hasthe largest curvature of all surfaces of lens elements in the opticallens assembly.

The second lens element 920 with negative refractive power has anobject-side surface 921 being concave and an image-side surface 922being concave. The second lens element 920 is made of plastic materialand has the object-side surface 921 and the image-side surface 922 beingboth aspheric. A curvature of the image-side surface 922 of the secondlens element 920 is increasingly concave from a paraxial region to anoff-axis region thereof, and the image-side surface 912 of the firstlens element 910 and the object-side surface 921 of the second lenselement 920 have the smallest curvature of all surfaces of lens elementsin the optical lens assembly.

The third lens element 930 with negative refractive power has anobject-side surface 931 being concave and an image-side surface 932being convex. The third lens element 930 is made of plastic and has theobject-side surface 931 and the image-surface 932 being both aspheric. Acurvature of the object-side surface 931 of the third lens element 930is increasingly concave from a paraxial region to an off-axis regionthereof.

The IR-filter 940 is made of glass material and located between thethird lens element 930 and the image surface 950, and will not affect afocal length of the optical lens assembly.

The detailed optical data of the 9th embodiment are shown in Table 17and the aspheric surface data are shown in Table 18 below.

TABLE 17 9th Embodiment f = 4.01 mm, Fno = 2.43, HFOV = 17.6 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Ape. Stop Plano −0.413  2 Lens 1 0.991 ASP0.607 Plastic 1.544 55.9 1.75 3 −18.211 ASP 0.093 4 Lens 2 −25.135 ASP0.332 Plastic 1.639 23.5 −2.53 5 1.736 ASP 0.996 6 Lens 3 −1.561 ASP0.840 Plastic 1.639 23.5 −7.57 7 −2.788 ASP 0.200 8 IR-filter Plano0.210 Glass 1.517 64.2 — 9 Plano 0.447 10 Image Plano — Note: Referencewavelength is 587.6 nm (d-line). Effective radius of Surface 5 is 0.570mm.

TABLE 18 Aspheric Coefficients Surface # 2 3 4 k= −8.7841E−01−6.0246E+01 1.6867E+01 A4=  5.4633E−02  1.4282E−01 2.0406E−01 A6= 3.9878E−01 −6.7128E−01 −7.7997E−01  A8= −1.2901E+00  2.1830E+003.1152E+00 A10=  2.2213E+00 −3.3154E+00 −6.0933E+00  A12= −1.3550E+00 1.7341E+00 4.3801E+00 Surface # 5 6 7 k= −8.9899E+01 1.7555E+00−6.2658E+00 A4=  2.1413E+00 −4.7461E−01  −2.5285E−01 A6= −1.5365E+012.5681E+00  2.5871E−01 A8=  9.6148E+01 −1.6837E+01  −6.1344E−01 A10=−3.4796E+02 5.5943E+01  8.2196E−01 A12=  6.6267E+02 −9.6482E+01 −5.8296E−01 A14= −4.8431E+02 6.5636E+01  1.6299E−01

In the 9th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 9th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 17 and Table 18as the following values and satisfy the following conditions:

9th Embodiment f [mm] 4.01 R5/f −0.39 Fno 2.43 |(R2 + R3)/(R2 − R3)|6.26 HFOV [deg.] 17.6 (R3 + R4)/(R3 − R4) 0.87 (V2 + V3)/V1 0.84|f/f1| + |f/f2| 3.89 CT1/CT2 1.83 SD/TD 0.86 (CT2 + CT3)/CT1 1.93 TD/f0.71 T12/CT2 0.28 f/ImgH 3.10 T12/T23 0.09 EPD/ImgH 1.28 R1/f 0.25TL/ImgH 2.88 f/R4 2.31

10th Embodiment

FIG. 19 is a schematic view of an image capturing device according tothe 10th embodiment of the present disclosure. FIG. 20 shows, in orderfrom left to right, spherical aberration curves, astigmatic fieldcurves, and a distortion curve of the image capturing device accordingto the 10th embodiment. In FIG. 19, the image capturing device includesan optical lens assembly (its reference numeral is omitted) and an imagesensor 1060. The optical lens assembly includes, in order from an objectside to an image side, an aperture stop 1000, a first lens element 1010,a second lens element 1020, a third lens element 1030, an IR-filter1040, and an image surface 1050, wherein the image sensor 1060 islocated at the image surface 1050. The optical lens assembly has a totalof three lens elements (1010-1030) with refractive power, and the firstlens element 1010, the second lens element 1020, and the third lenselement 1030 are independent and non-cemented lens elements.

The first lens element 1010 with positive refractive power has anobject-side surface 1011 being convex and an image-side surface 1012being convex. The first lens element 1010 is made of glass material andhas the object-side surface 1011 and the image-side surface 1012 beingboth aspheric. The object-side surface 1011 of the first lens element1010 has the largest curvature of all surfaces of lens elements in theoptical lens assembly.

The second lens element 1020 with negative refractive power has anobject-side surface 1021 being concave and an image-side surface 1022being concave. The second lens element 1020 is made of plastic materialand has the object-side surface 1021 and the image-side surface 1022being both aspheric. A curvature of the image-side surface 1022 of thesecond lens element 1020 is increasingly concave from a paraxial regionto an off-axis region thereof, and the image-side surface 1012 of thefirst lens element 1010 and the object-side surface 1021 of the secondlens element 1020 have the smallest curvature of all surfaces of lenselements in the optical lens assembly.

The third lens element 1030 with negative refractive power has anobject-side surface 1031 being concave and an image-side surface 1032being convex. The third surface 1030 is made of plastic material and hasthe object-side surface 1031 and the image-side surface 1032 being bothaspheric. A curvature of the object-side surface 1031 of the third lenselement 1030 is increasingly concave from a paraxial region to anoff-axis region thereof.

The IR-filter 1040 is made of glass material and located between thethird lens element 1030 and the image surface 1050, and will not affecta focal length of the optical lens assembly.

The detailed optical data of the 10th embodiment are shown in Table 19and the aspheric surface data are shown in Table 20 below.

TABLE 19 10th Embodiment f = 5.07 mm, Fno = 2.55, HFOV = 21.1 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Ape. Stop Plano −0.372  2 Lens 1 1.487 ASP0.619 Glass 1.571 52.9 2.29 3 −9.181 ASP 0.094 4 Lens 2 −8.004 ASP 1.037Plastic 1.614 25.6 −3.07 5 2.593 ASP 0.725 6 Lens 3 −3.544 ASP 1.300Plastic 1.614 25.6 −15.68 7 −6.392 ASP 0.350 8 IR-filter Plano 0.330Glass 1.517 64.2 — 9 Plano 0.703 10 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 20 Aspheric Coefficients Surface # 2 3 4 k= −7.3563E−01−1.0000E+00 1.7955E+01 A4=  2.0445E−02  1.5704E−03 8.6684E−04 A6= 2.4312E−02 −2.2178E−03 4.8988E−03 A8= −3.5708E−02 −4.8991E−034.2656E−03 A10=  3.1671E−02  1.9608E−02 1.3008E−02 A12= −1.0130E−02−9.8385E−03 −8.7395E−03  Surface # 5 6 7 k= −9.0000E+01 7.2023E+00 5.8818E+00 A4=  5.9505E−01 −8.7320E−02  −3.2020E−02 A6= −2.0156E+00−7.9348E−02  −2.5416E−02 A8=  5.8199E+00 1.5107E−01  3.1734E−02 A10=−9.8298E+00 −2.0901E−01  −2.0674E−02 A12=  9.0228E+00 1.9939E−02 6.4297E−03 A14= −3.1899E+00 1.0485E−01 −7.6245E−04

In the 10th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 10th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 19 and Table 20as the following values and satisfy the following conditions:

10th Embodiment f [mm] 5.07 R5/f −0.70 Fno 2.55 |(R2 + R3)/(R2 − R3)|14.60 HFOV [deg.] 21.1 (R3 + R4)/(R3 − R4) 0.51 (V2 + V3)/V1 0.97|f/f1| + |f/f2| 3.87 CT1/CT2 0.60 SD/TD 0.90 (CT2 + CT3)/CT1 3.78 TD/f0.74 T12/CT2 0.09 f/ImgH 2.47 T12/T23 0.13 EPD/ImgH 0.97 R1/f 0.29TL/ImgH 2.52 f/R4 1.96

11th Embodiment

FIG. 21 is a schematic view of an image capturing device according tothe 11th embodiment of the present disclosure. FIG. 22 shows, in orderfrom left to right, spherical aberration curves, astigmatic fieldcurves, and a distortion curve of the image capturing device accordingto the 11th embodiment. In FIG. 21, the image capturing device includesan optical lens assembly (its reference numeral is omitted) and an imagesensor 1160. The optical lens assembly includes, in order from an objectside to an image side, a first lens element 1110, an aperture stop 1100,a second lens element 1120, a third lens element 1130, an IR-filter1140, and an image surface 1150, wherein the image sensor 1160 islocated at the image surface 1150. The optical lens assembly has a totalof three lens elements (1110-1130), and the first lens element 1110, thesecond lens element 1120, and the third lens element 1130 areindependent and non-cemented lens elements.

The first lens element 1110 with positive refractive power has anobject-side surface 1111 being convex and an image-side surface 1112being convex. The first lens element 1110 is made of plastic materialand has the object-side surface 1111 and the image-side surface 1112being both aspheric. The object-side surface 1111 of the first lenselement 1110 has the largest curvature of all surfaces of lens elementsin the optical lens assembly.

The second lens element 1120 with negative refractive power has anobject-side surface 1121 being concave and an image-side surface 1122being concave. The second lens element 1120 is made of plastic materialand has the object-side surface 1121 and the image-side surface 1122being both aspheric. A curvature of the image-side surface 1122 of thesecond lens element 1120 is increasingly concave from a paraxial regionto an off-axis region thereof, and the image-side surface 1112 of thefirst lens element 1110 and the object-side surface 1121 of the secondlens element 1120 have the smallest curvature of all surfaces of lenselements in the optical lens assembly.

The third lens element 1130 with negative refractive power has anobject-side surface 1131 being concave and an image-side surface 1132being concave. The third lens element 1130 is made of plastic and hasthe object-side surface 1131 and the image-side surface 1132 being bothaspheric. A curvature of the object-side surface 1131 of the third lenselement 1130 is increasingly concave from a paraxial region to anoff-axis region thereof.

The IR-filter 1140 is made of glass material and located between thethird lens element 1130 and the image surface 1150, and will not affecta focal length of the optical lens assembly.

The detailed optical data of the 11th embodiment are shown in Table 21and the aspheric surface data are shown in Table 22 below.

TABLE 21 11th Embodiment f = 4.77 mm, Fno = 2.50, HFOV = 22.2 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 1.718 ASP 0.745 Plastic 1.583 55.0 2.352 −5.727 ASP 0.040 3 Ape. Stop Plano 0.049 4 Lens 2 −8.074 ASP 1.051Plastic 1.614 25.6 −3.12 5 2.640 ASP 0.939 6 Lens 3 −12.018 ASP 1.300Plastic 1.640 23.3 −13.00 7 28.152 ASP 0.316 8 IR-filter Plano 0.350Glass 1.517 64.2 — 9 Plano 0.294 10 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 22 Aspheric Coefficients Surface # 1 2 4 k= −9.9182E−01−1.0000E+00 −3.5109E+01 A4=  1.1161E−02  1.6958E−02  1.8094E−02 A6= 1.4481E−02  3.4567E−03  1.6889E−02 A8= −3.5796E−02 −2.9480E−02−2.1314E−02 A10=  3.1107E−02  1.6853E−02 −9.1958E−04 A12= −1.5102E−02−5.1448E−03  1.3445E−02 Surface # 5 6 7 k= −8.7354E+01 −5.5959E+01−9.0000E+01 A4=  5.5850E−01 −6.9340E−02 −2.8689E−02 A6= −1.8980E+00−8.7244E−02 −3.1955E−02 A8=  5.5586E+00  1.3929E−01  2.4110E−02 A10=−9.8481E+00 −1.3841E−01 −1.0521E−02 A12=  9.4766E+00  4.0025E−02 2.1689E−03 A14= −3.6977E+00  5.9606E−03 −1.5780E−04

In the 11th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 11th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 21 and Table 2as the following values and satisfy the following conditions:

11th Embodiment f [mm] 4.77 R5/f −2.52 Fno 2.50 |(R2 + R3)/(R2 − R3)|5.88 HFOV [deg.] 22.2 (R3 + R4)/(R3 − R4) 0.51 (V2 + V3)/V1 0.89|f/f1| + |f/f2| 3.55 CT1/CT2 0.71 SD/TD 0.81 (CT2 + CT3)/CT1 3.16 TD/f0.87 T12/CT2 0.09 f/ImgH 2.32 T12/T23 0.09 EPD/ImgH 0.93 R1/f 0.36TL/ImgH 2.48 f/R4 1.81

12th Embodiment

FIG. 23 is a schematic view of an image capturing device according tothe 12th embodiment of the present disclosure. FIG. 24 shows, in orderfrom left to right, spherical aberration curves, astigmatic fieldcurves, and a distortion curve of the image capturing device accordingto the 12th embodiment. In FIG. 23, the image capturing device includesan optical lens assembly (its reference numeral is omitted) and an imagesensor 1260. The optical lens assembly includes, in order from an objectside to an image side, an aperture stop 1200, a first lens element 1210,a second lens element 1220, a third lens element 1230, an IR-filter1240, and an image surface 1250, wherein the image sensor 1260 islocated at the image surface 1250 of the optical lens assembly. Theoptical lens assembly has a total of three lens elements (1210-1230),and the first lens element 1210, the second lens element 1220, and thethird lens element 1230 are independent and non-cemented lens element.

The first lens element 1210 with positive refractive power has anobject-side surface 1211 being convex and an image-side surface 1212being concave. The first lens element 1210 is made of plastic and hasthe object-side surface 1211 and the image-side surface 1212 being bothaspheric. The object-side surface 1211 of the first lens element 1210has the largest curvature of all surfaces of lens elements in theoptical lens assembly.

The second lens element 1220 with negative refractive power has anobject-side surface 1221 being convex and an image-side surface 1222being concave. The second lens element 1220 is made of plastic and hasthe object-side surface 1221 and the image-side surface 1222 being bothaspheric. A curvature of the image-side surface 1222 of the second lenselement 1220 is increasingly concave from a paraxial region to anoff-axis region thereof, and the image-side surface 1212 of the firstlens element 1210 and the object-side surface 1221 of the second lenselement 1220 have the smallest curvature of all surfaces of lenselements in the optical lens assembly.

The third lens element 1230 with positive refractive power has anobject-side surface 1231 being concave and an image-side surface 1232being convex. The third lens element 1230 is made of plastic and has theobject-side surface 1231 and the image-side surface 1232 being bothaspheric. A curvature of the object-side surface 1231 of the third lenselement 1230 is increasingly concave from a paraxial region to anoff-axis region thereof.

The IR-filter 1240 is made of glass material and is located between thethird lens element 1230 and the image surface 1250, and will not affecta focal length of the optical lens assembly.

The detailed optical data of the 12th embodiment are shown in Table 23and the aspheric surface data are shown in Table 24 below.

TABLE 23 12th Embodiment f = 3.83 mm, Fno = 2.75, HFOV = 17.8 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Ape. Stop Plano −0.325  2 Lens 1 0.916 ASP0.551 Plastic 1.530 55.8 1.77 3 28.331 ASP 0.080 4 Lens 2 3.640 ASP0.313 Plastic 1.640 23.3 −2.07 5 0.938 ASP 0.633 6 Lens 3 −1.494 ASP0.527 Plastic 1.640 23.3 20.22 7 −1.524 ASP 0.200 8 IR-filter Plano0.210 Glass 1.517 64.2 — 9 Plano 1.244 10 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 24 Aspheric Coefficients Surface # 2 3 4 k= −6.6938E−01 9.0000E+01−6.9099E+01 A4=  9.4013E−02 −4.1050E−02  −1.3234E−01 A6=  3.2108E−012.5273E−02 −1.4519E−01 A8= −8.8168E−01 4.9037E−02  4.4150E−01 A10= 1.9267E+00 1.5435E+00  1.8095E+00 A12= −9.7768E−01 −3.5313E+00 −6.8589E+00 Surface # 5 6 7 k= −2.0744E+01 2.3276E+00 −7.7810E−02 A4= 2.8377E+00 −1.6915E−01  −8.5640E−02 A6= −2.1851E+01 −6.2761E−01 −2.6569E−01 A8=  1.4515E+02 3.0321E+00  7.3860E−01 A10= −5.7798E+02−9.2903E+00  −1.4850E+00 A12=  1.2667E+03 5.9049E+00  1.2989E+00 A14=−1.0836E+03 1.4239E+01 −4.4284E−01

In the 12th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 12th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 23 and Table 24as the following values and satisfy the following conditions:

12th Embodiment f [mm] 3.83 R5/f −0.39 Fno 2.75 |(R2 + R3)/(R2 − R3)|1.29 HFOV [deg.] 17.8 (R3 + R4)/(R3 − R4) 1.69 (V2 + V3)/V1 0.84|f/f1| + |f/f2| 4.01 CT1/CT2 1.76 SD/TD 0.85 (CT2 + CT3)/CT1 1.53 TD/f0.55 T12/CT2 0.03 f/ImgH 2.96 T12/T23 0.13 EPD/ImgH 1.08 R1/f 0.24TL/ImgH 2.90 f/R4 4.08

13th Embodiment

FIG. 25 is a schematic view of an image capturing device according tothe 13th embodiment of the present disclosure. In FIG. 25, the imagecapturing device includes the optical lens assembly (its referencenumeral is omitted) according to the present disclosure and the imagesensor. It should be noted that the optical lens assembly and the imagesensor 160 shown in the FIG. 25 are the same as aforementioned in the1st embodiment, and the same reference numbers are used in the drawingand the description to refer to the same parts. In practicalapplications, the optical lens assembly and the image sensor can be oneof the optical lens assemblies and image sensors aforementioned in the2nd to 12th embodiment.

The optical lens assembly is located between an imaged object 20 and theimage sensor 160, and the image sensor 160 is located at the imagesurface 150 of the optical lens assembly. The optical lens assembly isconfigured to image the imaged object 20 on the image sensor 160 locatedat the image surface 150.

14th Embodiment

FIG. 26 is a schematic view of an image capturing device according tothe 14th embodiment of the present disclosure. In FIG. 26, the imagecapturing device includes the optical lens assembly (its referencenumeral is omitted) according to the present disclosure, a prism 21, andthe image sensor. It should be noted that the optical lens assembly andthe image sensor shown in the FIG. 26 are the same as aforementioned inthe 1st embodiment, and the same reference numbers are used in thedrawing and the description to refer to the same parts. In practicalapplications, the optical lens assembly and the image sensor can be oneof the optical lens assemblies and image sensors aforementioned in the2nd to 12th embodiment.

The optical lens assembly is located between an imaged object 20 and theimage sensor 160, the image sensor 160 is located at the image surface150 of the optical lens assembly, and the prism 21 is located betweenthe image object 20 and the optical lens assembly. The optical lensassembly is configured to image the imaged object 20 on the image sensor160 located at the image surface 150. The prism 21 has a function ofredirecting light at a designed angle, so that the imaged capturingdevice has a flexible space allocation since the height of the imagecapturing device is reduced, and the image capturing device can beemployed in compact electronic devices.

The foregoing description, for purpose of explanation, has beendescribed with reference to specific embodiments. It is to be noted thatTables 1-24 show different data of the different embodiments; however,the data of the different embodiments are obtained from experiments. Theembodiments were chosen and described in order to best explain theprinciples of the disclosure and its practical applications, to therebyenable others skilled in the art to best utilize the disclosure andvarious embodiments with various modifications as are suited to theparticular use contemplated. The embodiments depicted above and theappended drawings are exemplary and are not intended to be exhaustive orto limit the scope of the present disclosure to the precise formsdisclosed. Many modifications and variations are possible in view of theabove teachings.

What is claimed is:
 1. An optical lens assembly, comprising three lenselements, the three lens elements being, in order from an object side toan image side: a first lens element, a second lens element and a thirdlens element; each of the three lens elements comprising an object-sidesurface facing toward the object side and an image-side surface facingtoward the image side; wherein the first lens element has positiverefractive power, the object-side surface of the first lens element isconvex in a paraxial region thereof and at least one of the object-sideand image-side surfaces of the first lens element is aspheric; thesecond lens element has negative refractive power, the object-sidesurface of the second lens element is convex in a paraxial regionthereof, and the image-side surface of the second lens element isconcave in a paraxial region thereof; the image-side surface of thethird lens element is convex in a paraxial region thereof; wherein theoptical lens assembly has a total of three lens elements, a centralthickness of the first lens element is CT1, a central thickness of thesecond lens element is CT2, a central thickness of the third lenselement is CT3, a curvature radius of the object-side surface of thefirst lens element is R1, a curvature radius of the image-side surfaceof the first lens element is R2, a curvature radius of the object-sidesurface of the second lens element is R3, a focal length of the opticallens assembly is f, and the following conditions are satisfied:0<CT1/CT2<1.65; 0.25≤R1/f<0.40; 0.5<|(R2+R3)/(R2−R3)|<20; and1.30<(CT2+CT3)/CT1≤2.25.
 2. The optical lens assembly of claim 1,wherein the object-side surfaces and the image-side surfaces of thefirst lens element and the second lens element are aspheric, an axialdistance between the first lens element and the second lens element isT12, the central thickness of the second lens element is CT2, and thefollowing condition is satisfied: 0≤T12/CT2≤0.12.
 3. The optical lensassembly of claim 1, wherein the first lens element and the second lenselement are made of plastic, an axial distance between the first lenselement and the second lens element is T12, an axial distance betweenthe second lens element and the third lens element is T23, and thefollowing condition is satisfied: 0<T12/T23≤0.09.
 4. The optical lensassembly of claim 1, wherein each of the three lens elements is a singleand non-cemented lens element, the focal length of the optical lensassembly is f, a curvature radius of the image-side surface of thesecond lens element is R4, an axial distance between the first lenselement and the second lens element is T12, an axial distance betweenthe second lens element and the third lens element is T23, the centralthickness of the first lens element is CT1, the central thickness of thesecond lens element is CT2, and the following conditions are satisfied:1.25<f/R4; 0<T12/T23<0.50; and 0.80≤CT1/CT2<1.65.
 5. The optical lensassembly of claim 1, wherein a refractive index of the third lenselement is a maximum value among refractive indexes of the three lenselements.
 6. The optical lens assembly of claim 1, wherein an absolutevalue of a curvature radius of the object-side surface of the third lenselement is smaller than an absolute value of a curvature radius of theimage-side surface of the third lens element.
 7. An image capturingdevice, comprising: the optical lens assembly of claim 1; a prism; andan image sensor disposed on an image surface of the optical lensassembly.
 8. An optical lens assembly, comprising three lens elements,the three lens elements being, in order from an object side to an imageside: a first lens element, a second lens element and a third lenselement; each of the three lens elements comprising an object-sidesurface facing toward the object side and an image-side surface facingtoward the image side; wherein the first lens element has positiverefractive power, the object-side surface of the first lens element isconvex in a paraxial region thereof, and the image-side surface of thefirst lens element is concave in a paraxial region thereof; the secondlens element has negative refractive power, the object-side surface ofthe second lens element is convex in a paraxial region thereof, and theimage-side surface of the second lens element is concave in a paraxialregion thereof; the image-side surface of the third lens element isconvex in a paraxial region thereof, and a refractive index of the thirdlens element is a maximum value among refractive indexes of the threelens elements, a central thickness of the first lens element is largerthan a central thickness of the third lens element; wherein the opticallens assembly has a total of three lens elements, a central thickness ofthe first lens element is CT1, a central thickness of the second lenselement is CT2, a curvature radius of the object-side surface of thefirst lens element is R1, a curvature radius of the image-side surfaceof the first lens element is R2, a curvature radius of the object-sidesurface of the second lens element is R3, a focal length of the opticallens assembly is f, and the following conditions are satisfied:0<CT1/CT2<1.65; 0<R1/f<0.40; and 0.5<|(R2+R3)/(R2−R3)|<20.
 9. Theoptical lens assembly of claim 8, wherein the object-side surfaces andthe image-side surfaces of the first lens element and the second lenselement are aspheric, the central thickness of the first lens element isCT1, the central thickness of the second lens element is CT2, and thefollowing condition is satisfied: 0.80≤CT1/CT2<1.65.
 10. The opticallens assembly of claim 8, wherein the first lens element and the secondlens element are made of plastic, the curvature radius of the image-sidesurface of the first lens element is R2, the curvature radius of theobject-side surface of the second lens element is R3, and the followingcondition is satisfied: 0.5<|(R2+R3)/(R2−R3)|≤9.32.
 11. The optical lensassembly of claim 8, wherein the curvature radius of the object-sidesurface of the first lens element is R1, the focal length of the opticallens assembly is f, and the following condition is satisfied:0.25≤R1/f<0.40.
 12. The optical lens assembly of claim 8, wherein thefocal length of the optical lens assembly is f, a focal length of thefirst lens element is f1, a focal length of the second lens element isf2, and the following condition is satisfied: 3.0<|f/f1|+|f/f2|<6.0. 13.The optical lens assembly of claim 8, wherein an absolute value of acurvature radius of the object-side surface of the third lens element issmaller than an absolute value of a curvature radius of the image-sidesurface of the third lens element.
 14. An image capturing device,comprising: the optical lens assembly of claim 8; a prism; and an imagesensor disposed on an image surface of the optical lens assembly.
 15. Anoptical lens assembly, comprising three lens elements, the three lenselements being, in order from an object side to an image side: a firstlens element, a second lens element and a third lens element; each ofthe three lens elements comprising an object-side surface facing towardthe object side and an image-side surface facing toward the image side;wherein the first lens element has positive refractive power, theobject-side surface of the first lens element is convex in a paraxialregion thereof; the second lens element has negative refractive power,the object-side surface of the second lens element is convex in aparaxial region thereof, and the image-side surface of the second lenselement is concave in a paraxial region thereof; the image-side surfaceof the third lens element is convex in a paraxial region thereof, and acentral thickness of the first lens element is larger than a centralthickness of the third lens element; wherein the optical lens assemblyhas a total of three lens elements, a central thickness of the firstlens element is CT1, a central thickness of the second lens element isCT2, a curvature radius of the object-side surface of the first lenselement is R1, a focal length of the optical lens assembly is f, and thefollowing conditions are satisfied: 0<CT1/CT2<1.65; and 0.25≤R1/f<0.40.16. The optical lens assembly of claim 15, wherein the first lenselement has at least one inflection point.
 17. The optical lens assemblyof claim 15, wherein the object-side surfaces and the image-sidesurfaces of the first lens element and the second lens element areaspheric, the first lens element and the second lens element are made ofplastic.
 18. The optical lens assembly of claim 15, wherein an absolutevalue of a curvature radius of the object-side surface of the third lenselement is smaller than an absolute value of a curvature radius of theimage-side surface of the third lens element.
 19. The optical lensassembly of claim 15, wherein a refractive index of the third lenselement is a maximum value among refractive indexes of the three lenselements.
 20. An image capturing device, comprising: the optical lensassembly of claim 15; a prism; and an image sensor disposed on an imagesurface of the optical lens assembly.
 21. An optical lens assembly,comprising three lens elements, the three lens elements being, in orderfrom an object side to an image side: a first lens element, a secondlens element and a third lens element; each of the three lens elementscomprising an object-side surface facing toward the object side and animage-side surface facing toward the image side; wherein the first lenselement has positive refractive power, the object-side surface of thefirst lens element is convex in a paraxial region thereof, and the firstlens element has at least one inflection point; the second lens elementhas negative refractive power, the object-side surface of the secondlens element is convex in a paraxial region thereof, and the image-sidesurface of the second lens element is concave in a paraxial regionthereof; the image-side surface of the third lens element is convex in aparaxial region thereof, and an absolute value of a curvature radius ofthe object-side surface of the first lens element is smaller than anabsolute value of a curvature radius of the image-side surface of thefirst lens element; wherein the optical lens assembly has a total ofthree lens elements, a central thickness of the first lens element isCT1, a central thickness of the second lens element is CT2, a curvatureradius of the object-side surface of the first lens element is R1, afocal length of the optical lens assembly is f, an axial distancebetween the first lens element and the second lens element is T12, andthe following conditions are satisfied: 0<CT1/CT2<1.65; 0<R1/f<0.40; and0<T12/CT2<0.80.
 22. The optical lens assembly of claim 21, wherein theobject-side surfaces and the image-side surfaces of the first lenselement and the second lens element are aspheric, each of the three lenselements is a single and non-cemented lens element, the centralthickness of the second lens element is CT2, the axial distance betweenthe first lens element and the second lens element is T12, and thefollowing condition is satisfied: 0<T12/CT2≤0.18.
 23. The optical lensassembly of claim 21, wherein the first lens element and the second lenselement are made of plastic, the axial distance between the first lenselement and the second lens element is T12, an axial distance betweenthe second lens element and the third lens element is T23, and thefollowing condition is satisfied: 0<T12/T23<0.50.
 24. The optical lensassembly of claim 21, wherein a half of maximum field of view of theoptical lens assembly is HFOV, and the following condition is satisfied:7.5 degrees<HFOV≤17.6 degrees.
 25. An image capturing device,comprising: the optical lens assembly of claim 21; a prism; and an imagesensor disposed on an image surface of the optical lens assembly.